If you have excluded all of your foreign earned income for being taxable and you have not entered any other taxable income on the tax return, then the return cannot be e-filed with no taxable income entered.
However, if you add $1 of interest income it can be e-filed. On the Form 1099-INT enter any name for the payer of the interest and in box 1 of the form enter $1. This is an acceptable work around allowed by the IRS.
Enter 1099-int in the Search box located in the upper right of the program screen. Click on Jump to 1099-int